3 years ago

Which of the following reactions could be used to extract the lead from the lead nitrate?

Chemistry

1 answer:

alexgriva [62]3 years ago

4 0

Answer:

Option b. Decomposition

Followed by a reduction process using charcoal

Explanation:

Lead can be obtained from lead nitrate by thermal decomposition of lead nitrate as shown below:

2Pb(NO3)2 —> 2PbO + 4NO2 + O2

The PbO obtained is reduced by charcoal(C) to obtain the metallic Pb as shown below:

2PbO + C —> Pb + CO2

You might be interested in

Helpppppo meeeeee plzzzzzzzzz

antoniya [11.8K]

For 2 it’s 2ft 10in
For 5 it’s 3ft 6in
You: put how tall you are
Adult: you can either measure an adult or use this 5 ft 10in

6 0

3 years ago

The reaction that produces cellular energy in plants is called?

Setler79 [48]

Atp or the mitchodria

6 0

4 years ago

Use the image to rank the colors from the color that will refract the least to the color that will refract the most.

Liula [17]

Answer:

Red

yellow

Green

Blue

Violet

5 0

3 years ago

Read 2 more answers

Students learned that objects can exert forces on other objects without touching. Which three investigations will provide eviden

irinina [24]

Answer:

Explanation:

6 0

3 years ago

How many moles are in 2.8x10^24 atoms of silicon?

sergejj [24]

Answer:

4.6 mol Si

General Formulas and Concepts:

Atomic Structure

Reading a Periodic Table
Moles
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

[Given] 2.8 × 10²⁴ atoms Si

[Solve] moles Si

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[DA] Set up: $\displaystyle 2.8 \cdot 10^{24} \ atoms \ Si(\frac{1 \ mol \ Si}{6.022 \cdot 10^{23} \ atoms \ Si})$
[DA] Divide [Cancel like units]: $\displaystyle 4.64962 \ mol \ Si$

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

4.64962 mol Si ≈ 4.6 mol Si

6 0

3 years ago